Product Manual

22
Troubleshooting
WARNING
Hot engine parts can cause severe
burns. Always allow the engine time to cool
before performing any maintenance or service.
TABLE 5. TROUBLESHOOTING lists the Fault
Codes in numerical order along with step-by-step
corrective actions. If you are unable to resolve the
problem after taking the corrective actions sug-
gested, contact an authorized Onan dealer. See
How to Obtain Service (Page 32).
First note the following:
• Maintaining engine oil level, keeping battery
connections clean and tight, watching the fuel
gauge, not overloading the genset, etc. will
prevent most shutdowns.
• When the genset and vehicle engine share a
common fuel tank the fuel dip tubes are usual-
ly arranged so that the genset will run out of
fuel first. Marking the genset empty point on
the fuel gauge will make it easier to tell when
to stop the genset before running it out of fuel.
FAULT CODES
The genset controller provides extensive diagnos-
tics by causing the status indicator light on the Con-
trol Switch to blink in a coded fashion. Following a
fault shutdown, the indicator light will repeatedly
blink 2, 3 or 4 blinks at a time.
• Two blinks indicates a low oil pressure fault.
• Three blinks indicates a service fault. Press
Stop once to cause the two-digit, second-
level fault code to blink. (Pressing Stop again
will stop the blinking.)The two-digit code con-
sists of 1, 2, 3, 4 or 5 blinks, a brief pause, and
then 1 to 9 blinks. The first set of blinks repre-
sents the tens digit and the second set of
blinks the units digit of the fault code number.
For example, Fault Code No. 36 appears as:
blink-blink-blink—pause—blink-blink-blink-blink-blink-blink—
long pause—repeat
• Four blinks indicates that cranking
exceeded 30 seconds without the engine
starting.
•
Note: Fault Code Nos. 3 and 4 are first level
faults. Avoid interpreting them as second-level
Fault Code Nos. 33 and 44, which have not
been assigned as fault codes.
Restoring Fault Code Blinking − The fault code
stops blinking after five minutes (15 minutes, Series
HGJAA). Press Stop three times within five sec-
onds to restore blinking. Note that the last fault
logged will blink, even after the condition that
caused the shutdown has been corrected.
TABLE 5. TROUBLESHOOTING
Some genset service procedures present hazards that can result in severe per-
sonal injury or death. Only trained and experienced service personnel with knowledge of fuels,
electricity, and machinery hazards should perform genset service. See Safety Precautions.
WARNING
STATUS INDICATOR LIGHT DEAD
(Faulty connections, no battery voltage)
Corrective Action:
1. Try the genset Start Switch if the remote Start Switch does not work, and vice versa.
2. Clean and tighten the positive (+) and negative (−) battery cable connections at the battery, vehicle
frame and genset.
3. Recharge or replace the battery. Refer to the battery manufacturer’s recommendations.